Schutte, Clara-Maria; Van der Meyden, C.H. (Kees); Van Niekerk, Linette; Kakaza, Mandisa; Van Coller, Riaan; Ueckermann, Veronica; Oosthuizen, Nicholette M.(Health and Medical Publishing Group, 2016-01)
Venter, Marietjie; Human, Stacey; Van Niekerk, Stephanie; Williams, June Heather; Van Eeden, Charmaine; Freeman, Frank(Coordinating Center for Infectious Diseases, Centers for Disease Control and Prevention, 2011-08)